It's not so slow for everyone. - before throwing out the baby with the bath water, consider scrutinizing your system for something that may be rubbing it the wrong way (funny devices, software services / drivers, wonked files, failing hardware, incompatible monitor profiles ... ). Many people have solved abnormal slowness in such fashion. Please don't get me wrong - I'm not trying to persuade, merely trying to inform. (but I do adore Lightroom 4) - cheers, R.